I doubt it. People often buy gear without any certification --for example, some people buy gear before taking lessons on vacation. I'm pretty sure they will sell to anyone with cash or plastic.
Jeff
Good point. I imagine the average Costco shopper wouldn't have a c-card on them all the time either, which would really hamper the impulse buys, especially if the display is temporary.
If the kiosk is around this weekend, I'll ask the rep.